*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg-dark: #0f172a;
  --bg-medium: #162033;
  --bg-light: #1d2940;
  --bg-lighter: #28354d;

  --accent: #f97316;
  --accent-hover: #ea580c;
  --accent-dim: rgba(249, 115, 22, 0.14);

  --text: #e8edf5;
  --text-muted: #94a3b8;
  --border: #314158;

  --success: #22c55e;
  --warning: #f59e0b;
  --danger: #f87171;

  --sidebar-w: 300px;
  --radius: 8px;
}

html, body {
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg-dark);
  color: var(--text);
  font-size: 13px;
  line-height: 1.5;
}

/* ── Layout ── */
#app {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

#sidebar {
  width: var(--sidebar-w);
  min-width: var(--sidebar-w);
  background: var(--bg-dark);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  z-index: 1000;
}

#sidebar-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 16px;
  background: var(--bg-medium);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.header-icon {
  color: var(--accent);
  font-size: 16px;
}

#sidebar-header h1 {
  font-size: 14px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.6px;
  text-transform: uppercase;
  flex: 1;
}

.help-link {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-lighter);
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  flex-shrink: 0;
  transition: background 0.15s, color 0.15s;
}
.help-link:hover { background: var(--accent); color: #fff; border-color: var(--accent); }

#sidebar-body {
  overflow-y: auto;
  flex: 1;
  padding-bottom: 24px;
}

#sidebar-body::-webkit-scrollbar { width: 4px; }
#sidebar-body::-webkit-scrollbar-track { background: transparent; }
#sidebar-body::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

#map {
  flex: 1;
  position: relative;
  min-width: 0;
}

/* ── Sections ── */
.section {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.section-title {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
}

/* ── Units toggle ── */
.units-section {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: var(--bg-medium);
}

.units-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  transition: color 0.2s;
}

#label-imperial { color: var(--text); }

.toggle-switch {
  position: relative;
  display: inline-block;
  width: 42px;
  height: 24px;
  flex-shrink: 0;
}

.toggle-switch input { display: none; }

.toggle-slider {
  position: absolute;
  inset: 0;
  background: var(--bg-lighter);
  border-radius: 12px;
  cursor: pointer;
  transition: background 0.2s;
  border: 1px solid var(--border);
}

.toggle-slider::before {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  background: var(--text-muted);
  border-radius: 50%;
  top: 2px;
  left: 2px;
  transition: transform 0.2s, background 0.2s;
}

.toggle-switch input:checked + .toggle-slider {
  background: var(--accent-dim);
  border-color: var(--accent);
}

.toggle-switch input:checked + .toggle-slider::before {
  transform: translateX(18px);
  background: var(--accent);
}

/* ── Form inputs ── */
input[type="text"],
input[type="number"],
select {
  background: var(--bg-medium);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: var(--radius);
  padding: 7px 10px;
  font-size: 13px;
  width: 100%;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
  appearance: none;
  -webkit-appearance: none;
}

input[type="text"]:focus,
input[type="number"]:focus,
select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-dim);
}

select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%238888aa'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 28px;
  cursor: pointer;
}

select option {
  background: var(--bg-medium);
  color: var(--text);
}

.field-group { margin-bottom: 8px; }
.field-group:last-child { margin-bottom: 0; }

.field-label {
  display: block;
  font-size: 10px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.overlap-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

/* ── Search ── */
.search-row {
  display: flex;
  gap: 6px;
}

.search-row input { flex: 1; }

/* ── Buttons ── */
.btn {
  padding: 8px 12px;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 12px;
  font-weight: 600;
  transition: background 0.15s, opacity 0.15s, transform 0.1s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  white-space: nowrap;
}

.btn:active { transform: scale(0.97); }

.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-primary.drawing { background: #dc5a1a; }

.btn-secondary {
  background: var(--bg-lighter);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover { background: var(--bg-light); }

.btn-accent { background: var(--accent); color: #fff; }
.btn-accent:hover { background: var(--accent-hover); }

.btn-danger {
  background: transparent;
  color: var(--danger);
  border: 1px solid rgba(248,113,113,0.4);
}
.btn-danger:hover { background: rgba(248,113,113,0.12); }

.btn-export {
  background: linear-gradient(135deg, #f97316, #c2410c);
  color: #fff;
  font-size: 13px;
  padding: 10px;
  letter-spacing: 0.3px;
}
.btn-export:hover { opacity: 0.9; }

.btn-full { width: 100%; }
.btn-sm { padding: 4px 10px; font-size: 11px; }

.btn-row {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 6px;
}
.btn-row:last-child { margin-bottom: 0; }

.btn-icon {
  background: var(--bg-lighter);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: var(--radius);
  padding: 6px 9px;
  cursor: pointer;
  font-size: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s;
  flex-shrink: 0;
}
.btn-icon:hover { background: var(--bg-light); color: var(--accent); }

/* ── Stats panel ── */
#stats-panel { display: grid; gap: 2px; }

.stat-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 5px 0;
  border-bottom: 1px solid rgba(58,58,88,0.5);
}
.stat-row:last-child { border-bottom: none; }

.stat-label {
  font-size: 11px;
  color: var(--text-muted);
}

.stat-value {
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.stats-empty {
  color: var(--text-muted);
  font-size: 12px;
  text-align: center;
  padding: 10px 0;
  font-style: italic;
}

.warning-badge {
  background: rgba(251,191,36,0.1);
  border: 1px solid rgba(251,191,36,0.35);
  color: var(--warning);
  border-radius: var(--radius);
  padding: 7px 9px;
  font-size: 11px;
  margin-top: 10px;
  line-height: 1.4;
}

/* ── Projects ── */
#project-list { display: grid; gap: 6px; }

.project-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 10px;
  background: var(--bg-medium);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.15s, background 0.15s;
  cursor: default;
}

.project-item.active {
  border-color: var(--accent);
  background: var(--accent-dim);
}

.project-item:hover:not(.active) {
  border-color: var(--bg-lighter);
  background: var(--bg-light);
}

.project-name {
  font-size: 12px;
  color: var(--text);
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin-right: 6px;
  font-weight: 500;
}

.project-actions { display: flex; gap: 2px; }

.icon-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 3px 6px;
  border-radius: 4px;
  font-size: 13px;
  line-height: 1;
  transition: color 0.15s, background 0.15s;
}
.icon-btn:hover { color: var(--text); background: var(--bg-lighter); }
.icon-btn.danger:hover { color: var(--danger); background: rgba(248,113,113,0.1); }

/* ── Toast notifications ── */
#toast-container {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  padding: 10px 16px;
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 500;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.25s, transform 0.25s;
  max-width: 300px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.4);
  pointer-events: auto;
}
.toast.show { opacity: 1; transform: translateY(0); }
.toast-info    { background: var(--bg-lighter); color: var(--text); border: 1px solid var(--border); }
.toast-success { background: rgba(74,222,128,0.12); border: 1px solid rgba(74,222,128,0.4); color: var(--success); }
.toast-warning { background: rgba(251,191,36,0.12); border: 1px solid rgba(251,191,36,0.4); color: var(--warning); }
.toast-error   { background: rgba(248,113,113,0.12); border: 1px solid rgba(248,113,113,0.4); color: var(--danger); }

/* ── Leaflet overrides ── */
.leaflet-container { background: #0f172a; }

.leaflet-control-attribution {
  background: rgba(30,30,46,0.8) !important;
  color: var(--text-muted) !important;
  font-size: 10px !important;
}

.leaflet-control-attribution a { color: var(--accent) !important; }

.leaflet-control-zoom a {
  background: var(--bg-medium) !important;
  color: var(--text) !important;
  border-color: var(--border) !important;
}
.leaflet-control-zoom a:hover { background: var(--bg-lighter) !important; }

/* Draw toolbar dark styling */
.leaflet-draw-toolbar a {
  background-color: var(--bg-medium) !important;
  border-color: var(--border) !important;
}
.leaflet-draw-toolbar a:hover { background-color: var(--bg-lighter) !important; }

.leaflet-draw-section { border-color: var(--border) !important; }

/* Prevent number input spinners from looking odd */
input[type=number]::-webkit-inner-spin-button,
input[type=number]::-webkit-outer-spin-button {
  opacity: 0.5;
}